Portion of a shell of a sports helmet



FIG. 1 is a top, front and left side perspective view of a portion of a shell of a sports helmet showing my new design;

FIG. 2 is a rear and left side perspective view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a top plan view thereof.

The environmental structure shown in broken lines forms no part of the claimed design. 

I claim the ornamental design for a portion of a shell of a sports helmet, as shown and described. 